EP0064070A1 - Device for orienting a guiding head of an electro-erosion cutting machine. - Google Patents

Device for orienting a guiding head of an electro-erosion cutting machine.

Info

Publication number
EP0064070A1
EP0064070A1 EP19810903016 EP81903016A EP0064070A1 EP 0064070 A1 EP0064070 A1 EP 0064070A1 EP 19810903016 EP19810903016 EP 19810903016 EP 81903016 A EP81903016 A EP 81903016A EP 0064070 A1 EP0064070 A1 EP 0064070A1
Authority
EP
European Patent Office
Prior art keywords
wire
ball joints
guide
plate
plane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19810903016
Other languages
German (de)
French (fr)
Other versions
EP0064070B1 (en
Inventor
Benno Ibo Bonga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ateliers des Charmilles SA
Original Assignee
Ateliers des Charmilles SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ateliers des Charmilles SA filed Critical Ateliers des Charmilles SA
Priority to AT81903016T priority Critical patent/ATE9070T1/en
Publication of EP0064070A1 publication Critical patent/EP0064070A1/en
Application granted granted Critical
Publication of EP0064070B1 publication Critical patent/EP0064070B1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting
    • B23H7/06—Control of the travel curve of the relative movement between electrode and workpiece

Definitions

  • Devices are already known for orienting an injection and guiding head of a wire electrode in a machine for cutting an electro ⁇ of workpiece by erosive electrical discharges, this machine comprising a support for " guides of the electrode -wire, a support for the piece to be cut, means for producing a relative displacement between these supports so as to obtain the desired shape of the cutout, means for moving, on the support of the head, a tray carrying the head of guide, this in directions transverse to the longitudinal axis of the wire, and means for orienting at least one of the guide heads, from these transverse displacements, along the axis of the portion of wire included in the area of machining.
  • the direction for a guide head depends of course on existing lateral offset between the two guides on which past the trode wire élec ⁇ to cross the machining area and the distance separating these two guides in the direction height. In some machines, provision is made to be able to modify this distance as a function of the thickness of the workpiece, since it is advantageous for the precision of the machining that the guides are as close as possible to the machining zone. .
  • the problem of adapting the orientation angle of a guide head as a function of the distance separating the two guides has not so far been resolved by a purely mechanical construction. The present invention provides precisely a mechanical solution to this problem.
  • the device according to the invention is characterized in that the plate supports two ball joints arranged on either side of a plane of symmetry and so as to pivot in housings opening respectively on each face of this plate, one of these ball joints being integral with one of the guide heads and the other of these ball joints being solidai ⁇ re of a rod pivoting at a stationary point having a position symmetrical to that of the other head guiding with respect to the plane of symmetry of these two ball joints and in that it comprises mechanical connection means between these ball joints, these means being arranged so as to obtain symmetrical angular displacements of the ball joints with respect to said plane.
  • Fig. 1 is an explanatory view.
  • Fig. 2 is a side view of an EDM machine.
  • Fig. 3 is an enlarged sectional view of a detail of the machine according to FIG. 2.
  • Fig. is a section along line IV-IV of FIG. 3.
  • Fig. 1 shows an electrode part 1 to be cut by means of a wire electrode 2 passing over two guides 21 and 22 arranged on either side of the part 1.
  • a nozzle 3 is arranged so as to surround the wire 2
  • This nozzle has an inlet for the supply of a dielectric fluid, this inlet leading to an annular chamber 5 surrounding a passage 6 for the wire 2.
  • the fluid brought into the chamber 5 escapes through an annular passage 7 to form a jet 8 surrounding the wire and directed towards the machining area 9.
  • the assembly of the nozzle 3 and the guide 21 constitute a guide and injection head.
  • the nozzle 3 occupies the position shown in broken lines.
  • the nozzle When the guide is moved by a distance U to pass from position P to position P ', the nozzle must have an inclination corresponding to that of the wire, so that the jet of machining fluid remains coaxial with the wire.
  • FIG. 2 is a side view with partial sections of a cutting machine by EDM.
  • This machine comprises a frame 10 carrying a tank 11 in which the part 1 is fixed on supports 12.
  • the frame 10 carries a cross member 13 forming a slide for a part 14 carrying elements for guiding the wire electrode 2.
  • the wire constituting the electrode is supplied by a supply coil 15, passes over a roller 16, then enters a guide tube 17 ending at its lower part by a ball joint 18. The latter being taken with a ball joint 19 carrying the nozzle 3.
  • the wire then passes into the machining zone 9 of the part 1 and then into a lower guide 20 carried by a part 22 in the shape of a stirrup, this part being fixed to the sliding part 14. After the guide 20, the wire 2 still passes over return rollers 23 and 24 to come and wind on a take-up reel 25.
  • the sliding part 14 carries a support 26 movable vertically in the direction Z.
  • the lower part 27 of this support is provided with a table with crossed movements comprising two plates 28 and 29.
  • This table with crossed movements makes it possible to move the ball joint 19 and the injection head 3 relative to the guide 20 to give a desired inclination of the wire 2 in the machining zone 9, this zone possibly being thus oblique with respect to the main plane of the part 1.
  • the trajectory of the cut is determined by the displacements of the sliding part 14 which can take place in the direction X, perpendicular to the plane of the drawing, in combination with its displacements along Y of a part 30 comprising the tank 11 and the part 1. This arrangement is good known in the decou ⁇ per machine and is therefore not described or illustrated in more detail.
  • the means for maintaining the injection nozzle 3 oriented along the axis 2 in the machining zone 9 comprise a mechanical connection between. . the ball joints 18 and 19 which is arranged so as to obtain symmetrical angular displacements between these ball joints relative to a plane of symmetry 31 which is parallel to the main plane of the plate 29.
  • the angular movements of the ball joint 19 are controlled by those of the ball joint 18 which is subjected to the orientation of the tube 17.
  • this tube 17 passes through a guide 32 which occupies the image position of the guide 20 relative to the plane of symmetry 31.
  • the movements of the movement table are controlled by electric motors, for example of the stepping type.
  • the movement of the plate 29 relative to the plate 28 is controlled by a motor 37 whose shaft carries a threaded rod 38 engaged in a threaded bore of the plate 29.
  • the movements of the plate 28 relative to the support 26 are controlled by another motor acting correspondingly and which is not shown.
  • Fig. 3 is a view on a larger scale and in section illustrating the mechanical connection between the ball joints 18 and 19.
  • These two ball joints each comprise a spherical portion which is housed in a conical hole 40, respectively 41.
  • the ball joint 18 is integral with 'An annular part 42 which is biased towards the bottom of the hole 40 by three springs of which only one 43 is visible in the drawing. This spring is housed in a recess in the part 42 and bears on the one hand against the head of a screw 44 within reach
  • the other two springs are arranged at 120 ° on the annular part 42 relative to the spring 43.
  • the lower ball joint 19 is integral with the injection nozzle .3, the latter also being urged towards the plate 29 by three springs arranged in the same way as those acting on the annular piece 42. Only one of these springs is visible in fig. 3 and is designated by 46.
  • the ball joint 19 comprises a tubular part 47 terminated at its upper end by a tip in the form of a spherical zone 48, the latter being engaged in a circular cylindrical recess 49 of the ball joint 18.
  • the latter has a bore central communicating with the tube 17 and forming a passage for the wire electrode 2.
  • the ball joint 19 also contains a wire guide constituted by two cylindrical studs 51 and 52 whose heads are chamfered to form a V-shaped guide. These studs 51 and 52 are locked in position by screws 53 and 54 (FIG. 4).
  • the two ball joints 18 and 19 are coupled so that their movements are always symmetrical with respect to the plane of symmetry 31.
  • the lower guide 20 could be replaced by a guide and injection head of the same kind as the nozzle 3.
  • the movements of the lower nozzle could be controlled by any mechanical or electrical device, so as to correspond to the displacement of the upper nozzle, so that the lower nozzle remains constantly focused on the portion of the wire 2 included in the machining zone 9.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

Une machine pour le decoupage electro-erosif d'une piece (1) par une electrode-fil (2) comprend une buse (3) montee sur un plateau (29) qui est deplacable lateralement pour donner l'inclinaison desiree au fil (2) lors de son passage dans la zone d'usinage (9). Cette buse (3) est commandee pour rester toujours coaxiale au fil (2) dans la zone (9). Cette commande est realisee par une rotule (18) montee egalement sur le plateau (29) et portee par un tube (17) qui passe dans un guide (32) occupant toujours la position image du guide inferieur (20) par rapport au plan de symetrie (31). Une liaison mecanique entre les rotules (18) et (19) assure que les deplacements de la rotule (19) soient toujours symetriques par rapport aux deplacements de la rotule (18).A machine for the electro-erosive cutting of a piece (1) by a wire electrode (2) comprises a nozzle (3) mounted on a plate (29) which is laterally displaceable to give the desired inclination to the wire (2 ) when passing through the machining area (9). This nozzle (3) is controlled to always remain coaxial with the wire (2) in the zone (9). This control is carried out by a ball joint (18) also mounted on the plate (29) and carried by a tube (17) which passes through a guide (32) always occupying the image position of the lower guide (20) relative to the plane of symmetry (31). A mechanical connection between the ball joints (18) and (19) ensures that the displacements of the ball joint (19) are always symmetrical with respect to the displacements of the ball joint (18).

Description

Dispositif pour orienter une tête de guidage d'une machine à découper par électro-érosion Device for orienting a guide head of an EDM cutting machine
On connaît déjà des dispositifs pour orienter une tête d'injection et de guidage d'une électrode-fil dans une machine à découper une électro¬ de-pièce par décharges électriques érosives, cette machine comprenant un support pour des" guides de l'électrode-fil, un support pour la pièce à découper, des moyens pour produire un déplacement relatif entre ces supports de manière à obtenir la forme désirée de la découpe, des moyens pour déplacer, sur le support de la tête, un plateau portant la tête de guidage, ceci dans des directions transversales à l'axe longitudinal du fil, et des moyens pour orienter au moins une des têtes de guidage, à partir de ces déplacements transversaux, suivant l'axe de la portion de fil comprise dans la zone d'usinage.Devices are already known for orienting an injection and guiding head of a wire electrode in a machine for cutting an electro¬ of workpiece by erosive electrical discharges, this machine comprising a support for " guides of the electrode -wire, a support for the piece to be cut, means for producing a relative displacement between these supports so as to obtain the desired shape of the cutout, means for moving, on the support of the head, a tray carrying the head of guide, this in directions transverse to the longitudinal axis of the wire, and means for orienting at least one of the guide heads, from these transverse displacements, along the axis of the portion of wire included in the area of machining.
Un dispositif de ce genre est décrit notamment dans le brevet français 2.454.869.A device of this kind is described in particular in French patent 2,454,869.
L'orientation à donner à une tête de guidage dépend bien entendu du décalage latéral existant entre les deux guides sur lesquels passe ' l'élec¬ trode-fil pour traverser la zone d'usinage et de la distance séparant ces deux guides dans le sens de la hauteur. Dans certaines machines, il est prévu de pouvoir modifier cette distance en fonction de l'épaisseur de la pièce à découper, car il est avantageux, pour la précision de l'usinage que les guides soient aussi proches que possible de la zone d'usinage. Le problème de l'adaptation de l'angle d'orientation d'une tête de guidage en fonction de la distance séparant les deux guides n'a jusqu'ici pas été résolu par une construction purement mécanique. La présente invention apporte précisément une solution mécanique à ce problème. A cet effet, le dispositif selon l'invention est caractérisé en ce que le plateau supporte deux rotules disposées de part et d'autre d'un plan de symétrie et de manière à pivoter dans des logements s'ouvrant respectivement sur chaque face de ce plateau, l'une de ces rotules étant solidaire de l'une des têtes de guidage et l'autre de ces rotules étant solidai¬ re d'une tige pivotant en un point stationnaire ayant une position symétrique de celle de l'autre tête de guidage par rapport au plan de symétrie de ces deux rotules et en ce qu'il comporte des moyens de liaison mécanique entre ces rotules, ces moyens étant agencés de manière à obtenir des déplacements angulaires symétriques des rotules par rapport audit plan.The direction for a guide head depends of course on existing lateral offset between the two guides on which past the trode wire élec¬ to cross the machining area and the distance separating these two guides in the direction height. In some machines, provision is made to be able to modify this distance as a function of the thickness of the workpiece, since it is advantageous for the precision of the machining that the guides are as close as possible to the machining zone. . The problem of adapting the orientation angle of a guide head as a function of the distance separating the two guides has not so far been resolved by a purely mechanical construction. The present invention provides precisely a mechanical solution to this problem. To this end, the device according to the invention is characterized in that the plate supports two ball joints arranged on either side of a plane of symmetry and so as to pivot in housings opening respectively on each face of this plate, one of these ball joints being integral with one of the guide heads and the other of these ball joints being solidai¬ re of a rod pivoting at a stationary point having a position symmetrical to that of the other head guiding with respect to the plane of symmetry of these two ball joints and in that it comprises mechanical connection means between these ball joints, these means being arranged so as to obtain symmetrical angular displacements of the ball joints with respect to said plane.
Le dessin annexé représente schématiquement et à titre d'exemple une forme d'exécution du dispositif, objet de l'invention.The accompanying drawing shows schematically and by way of example an embodiment of the device, object of the invention.
La fig. 1 est une vue explicative.Fig. 1 is an explanatory view.
La fig. 2 est une vue latérale d'une machine à électro-érosion.Fig. 2 is a side view of an EDM machine.
La fig. 3 est une vue en coupe à plus grande échelle d'un détail de la machine selon la fig. 2.Fig. 3 is an enlarged sectional view of a detail of the machine according to FIG. 2.
La fig. est une coupe selon la ligne IV-IV de la fig. 3.Fig. is a section along line IV-IV of FIG. 3.
La fig. 1 montre une pièce-électrode 1 à découper au moyen -d'une électrode-fil 2 passant sur deux guides 21 et 22 disposés de part et d'autre de la pièce 1. Une buse 3 est disposée de façon à entourer le fil 2. Cette buse présente une entrée pour l'amenée d'un fluide diélectrique, cette entrée aboutissant à une chambre annulaire 5 entourant un passage 6 pour le fil 2. Le fluide amené dans la chambre 5 s'échappe par un passage annu¬ laire 7 pour former un jet 8 entourant le fil et dirigé en direction de la zone d'usinage 9. L'ensemble de la buse 3 et du guide 21 constituent une tête de guidage et d'injection. Lorsque le guide supérieur est dans la position P, la buse 3 occupe la position représentée en traits interrompus. Lorsque le guide est déplacé d'une distance U pour paser de la position P à la position P', la buse doit présenter une inclinaison correspondant à celle du fil, afin que le jet de fluide d'usinage reste coaxial au fil.Fig. 1 shows an electrode part 1 to be cut by means of a wire electrode 2 passing over two guides 21 and 22 arranged on either side of the part 1. A nozzle 3 is arranged so as to surround the wire 2 This nozzle has an inlet for the supply of a dielectric fluid, this inlet leading to an annular chamber 5 surrounding a passage 6 for the wire 2. The fluid brought into the chamber 5 escapes through an annular passage 7 to form a jet 8 surrounding the wire and directed towards the machining area 9. The assembly of the nozzle 3 and the guide 21 constitute a guide and injection head. When the upper guide is in position P, the nozzle 3 occupies the position shown in broken lines. When the guide is moved by a distance U to pass from position P to position P ', the nozzle must have an inclination corresponding to that of the wire, so that the jet of machining fluid remains coaxial with the wire.
La figure 2 est une vue latérale avec coupes partielles d'une machine à découper par électro-érosion. Cette machine comprend un bâti 10 portant une cuve 11 dans laquelle la pièce 1 est fixée sur des supports 12. Le bâti 10 porte une traverse 13 formant coulisse pour une pièce 14 portant des éléments de guidage de l'électrode-fil 2.Figure 2 is a side view with partial sections of a cutting machine by EDM. This machine comprises a frame 10 carrying a tank 11 in which the part 1 is fixed on supports 12. The frame 10 carries a cross member 13 forming a slide for a part 14 carrying elements for guiding the wire electrode 2.
Le fil constituant l'électrode est fournit par une bobine débitrice 15, passe sur un galet 16, puis pénètre dans un tube de guidage 17 se terminant à sa partie inférieure par une rotule 18. Cette dernière étant prise avec une rotule 19 portant la buse d'injection 3. Le fil passe ensuite dans la zone d'usinage 9 de la pièce 1 puis dans un guide inférieur 20 porté par une pièce 22 en forme d'étrier, cette pièce étant fixée à la pièce coulissante 14. Après le guide 20, le fil 2 passe encore sur des galets de renvoi 23 et 24 pour venir s'enrouler sur une bobine réceptrice 25.The wire constituting the electrode is supplied by a supply coil 15, passes over a roller 16, then enters a guide tube 17 ending at its lower part by a ball joint 18. The latter being taken with a ball joint 19 carrying the nozzle 3. The wire then passes into the machining zone 9 of the part 1 and then into a lower guide 20 carried by a part 22 in the shape of a stirrup, this part being fixed to the sliding part 14. After the guide 20, the wire 2 still passes over return rollers 23 and 24 to come and wind on a take-up reel 25.
La pièce coulissante 14 porte un support 26 déplaçable verticalement suivant la direction Z. La partie inférieure 27 de ce support est munie d'une table à mouvements croisés comprenant deux plateaux 28 et 29. Cette table à mouvements croisés permet de déplacer la rotule 19 et la tête d'injection 3 par rapport au guide 20 pour donner une inclinaison désirée du fil 2 dans la zone d'usinage 9, cette zone pouvant être ainsi oblique par rapport au plan principal de la pièce 1. La trajectoire de la découpe est déterminée par les déplacements de la pièce coulissante 14 qui peuvent avoir lieu dans la direction X, perpendiculaire au plan du dessin, en combinai¬ son avec des déplacements selon Y d'une pièce 30 comportant la cuve 11 et la pièce 1. Cette disposition est bien connue dans la machine à décou¬ per et n'est donc pas décrite ni illustrée plus en détails.The sliding part 14 carries a support 26 movable vertically in the direction Z. The lower part 27 of this support is provided with a table with crossed movements comprising two plates 28 and 29. This table with crossed movements makes it possible to move the ball joint 19 and the injection head 3 relative to the guide 20 to give a desired inclination of the wire 2 in the machining zone 9, this zone possibly being thus oblique with respect to the main plane of the part 1. The trajectory of the cut is determined by the displacements of the sliding part 14 which can take place in the direction X, perpendicular to the plane of the drawing, in combination with its displacements along Y of a part 30 comprising the tank 11 and the part 1. This arrangement is good known in the decou¬ per machine and is therefore not described or illustrated in more detail.
Les moyens permettant de maintenir la buse d'injection 3 orientée selon l'axe 2 dans la zone d'usinage 9 comprennent une liaison mécanique entre .. les rotules 18 et 19 qui est agencée de manière à obtenir des déplacements angulaires symétriques entre ces rotules par rapport à un plan de symétrie 31 qui est parallèle au plan principal du plateau 29. Les mouvements angulaires de la rotule 19 sont commandés par ceux de la rotule 18 qui est soumise à l'orientation du tube 17. A cet effet, ce tube 17 passe dans un guide 32 qui occupe la position image du guide 20 par rapport au plan de symétrie 31.The means for maintaining the injection nozzle 3 oriented along the axis 2 in the machining zone 9 comprise a mechanical connection between. . the ball joints 18 and 19 which is arranged so as to obtain symmetrical angular displacements between these ball joints relative to a plane of symmetry 31 which is parallel to the main plane of the plate 29. The angular movements of the ball joint 19 are controlled by those of the ball joint 18 which is subjected to the orientation of the tube 17. For this purpose, this tube 17 passes through a guide 32 which occupies the image position of the guide 20 relative to the plane of symmetry 31.
Comme le support 26 est déplaçable verticalement pour adapter la distance entre la buse d'injection 3 et le guide 20 à l'épaisseur de la pièce 1, il est nécessaire de déplacer le guide 32 pour que sa distance au plan 31 soit toujours la même que la distance du plan 31 au guide 20. Ceci est obtenu au moyen d'un coulisseau 33 muni d'une crémaillère 34 en prise avec une roue dentée 35 pivotant librement sur le support 26. Cette roue 35 étant prise avec une crémaillère 36 solidaire de la pièce coulissante 14. De cette façon tout déplacement vertical du support 26 et donc du plan de symétrie 31 entraîne un déplacement double du guide 32 par rapport au guide 20. Ainsi le pian de symétrie 31 est toujours placé à mi-distance entre les guides 32 et 20.As the support 26 can be moved vertically to adapt the distance between the injection nozzle 3 and the guide 20 to the thickness of the part 1, it is necessary to move the guide 32 so that its distance from the plane 31 is always the same that the distance from the plane 31 to the guide 20. This is obtained by means of a slide 33 provided with a rack 34 engaged with a toothed wheel 35 freely pivoting on the support 26. This wheel 35 being taken with a rack 36 secured of the sliding part 14. In this way any vertical displacement of the support 26 and therefore of the plane of symmetry 31 results in a double displacement of the guide 32 relative to the guide 20. Thus the plane of symmetry 31 is always placed midway between the guides 32 and 20.
Les déplacements de la table à mouvements sont commandés par des moteurs électriques, par exemple du type pas à pas. Le déplacement du plateau 29 par rapport au plateau 28 est commandé par un moteur 37 dont l'arbre porte une tige filetée 38 engagée dans un alésage fileté du plateau 29. Les déplacements du plateau 28 par rapport au support 26 sont commandés par un autre moteur agissant de façon correspondante et qui n'est pas représenté.The movements of the movement table are controlled by electric motors, for example of the stepping type. The movement of the plate 29 relative to the plate 28 is controlled by a motor 37 whose shaft carries a threaded rod 38 engaged in a threaded bore of the plate 29. The movements of the plate 28 relative to the support 26 are controlled by another motor acting correspondingly and which is not shown.
La fig. 3 est une vue à plus grande échelle et en coupe illustrant la liaison mécanique entre les rotules 18 et 19. Ces deux rotules compren¬ nent chacune une portion sphérique qui est logée dans un trou conique 40, respectivement 41. La rotule 18 est solidaire d'une pièce annulaire 42 qui est sollicitée vers le fond du trou 40 par trois ressorts dont un seul 43 est visible au dessin. Ce ressort est logé dans un évidement de la pièce 42 et prend appui d'une part contre la tête d'une vis 44 à portéeFig. 3 is a view on a larger scale and in section illustrating the mechanical connection between the ball joints 18 and 19. These two ball joints each comprise a spherical portion which is housed in a conical hole 40, respectively 41. The ball joint 18 is integral with 'An annular part 42 which is biased towards the bottom of the hole 40 by three springs of which only one 43 is visible in the drawing. This spring is housed in a recess in the part 42 and bears on the one hand against the head of a screw 44 within reach
/ fixée dans le plateau 29 et d'autre part contre une rondelle 45 logée dans le fond du trou. Bien entendu, les deux autres ressorts sont disposés à 120° sur la pièce annulaire 42 par rapport au ressort 43./ fixed in the plate 29 and on the other hand against a washer 45 housed in the bottom of the hole. Of course, the other two springs are arranged at 120 ° on the annular part 42 relative to the spring 43.
La rotule inférieure 19 est solidaire de la buse d'injection .3, cette dernière étant également sollicitée en direction du plateau 29 par trois ressorts disposés de la même façon que ceux agissant sur la pièce annu¬ laire 42. Un seul de ces ressorts est visible à la fig. 3 et est désigné par 46. La rotule 19 comprend une partie tubulaire 47 terminée à son extrémité supérieure par un embout en forme de zone sphérique 48, ce dernier étant engagé dans un évidement cylindrique circulaire 49 de la rotule 18. Cette dernière présente un perçage central communiquant avec le tube 17 et formant passage pour l'électrode-fil 2. Lors de son passage à la rotule 18 à la rotule 19 le fil 2 passe dans un palier 50 en rubis synthétique.The lower ball joint 19 is integral with the injection nozzle .3, the latter also being urged towards the plate 29 by three springs arranged in the same way as those acting on the annular piece 42. Only one of these springs is visible in fig. 3 and is designated by 46. The ball joint 19 comprises a tubular part 47 terminated at its upper end by a tip in the form of a spherical zone 48, the latter being engaged in a circular cylindrical recess 49 of the ball joint 18. The latter has a bore central communicating with the tube 17 and forming a passage for the wire electrode 2. When passing through the ball joint 18 to the ball joint 19 the wire 2 passes through a bearing 50 made of synthetic ruby.
La rotule 19 contient encore un guide fil constitué par deux plots cylindriques 51 et 52 dont les têtes sont chanfreinées pour constituer un guide en forme de V. Ces plots 51 et 52 sont bloqués en position par des vis 53 et 54 (figure 4).The ball joint 19 also contains a wire guide constituted by two cylindrical studs 51 and 52 whose heads are chamfered to form a V-shaped guide. These studs 51 and 52 are locked in position by screws 53 and 54 (FIG. 4).
Grâce à l'accouplement réalisé par la portion 48 en zone de sphère engagée dans l'évidement cylindrique de la rotule 18, les deux rotules 18 et 19 sont accouplées de façon que leurs mouvements sont toujours symétriques par rapport au plan de symétrie 31.Thanks to the coupling produced by the portion 48 in a sphere zone engaged in the cylindrical recess of the ball joint 18, the two ball joints 18 and 19 are coupled so that their movements are always symmetrical with respect to the plane of symmetry 31.
Bien entendu on pourrait remplacer le guide inférieur 20 par une tête de guidage et d'injection du même genre que la buse 3. Dans ce cas les déplacements de la buse inférieure pourraient être commandés par tout dispositif mécanique ou électrique , de façon à correspondre au déplacement de la buse supérieure, ceci de façon que la buse inférieure reste constamment axée sur la portion du fil 2 comprise dans la zone d'usinage 9. Of course, the lower guide 20 could be replaced by a guide and injection head of the same kind as the nozzle 3. In this case, the movements of the lower nozzle could be controlled by any mechanical or electrical device, so as to correspond to the displacement of the upper nozzle, so that the lower nozzle remains constantly focused on the portion of the wire 2 included in the machining zone 9.

Claims

Revendications claims
1. Dispositif pour orienter au moins une tête d'injection et de guidage d'une électrode-fil dans une machine à découper une électrode- pièce par décharges électriques érosives, cette machine comprenant un support pour des guides de l'électrode-fii, un support pour la pièce à découper, des moyens pour produire un déplacement relatif entre ces supports de manière à obtenir la forme désirée de la découpe, des moyens pour déplacer, sur le - support de la tête, un plateau portant la tête de guidage, ceci dans des directions transversales à l'axe longitudinal du fil, et des moyens pour orienter au moins une des têtes de guidage, à partir de ces déplacements transversaux, suivant l'axe de la portion de fil comprise dans la zone d'usinage, c a r a c t é r i s é en ce que le plateau supporte deux rotules disposées- de part et d'autre d'un plan de symétrie et de manière à pivoter dans des logements s'ouvrant respec¬ tivement sur chaque face de ce plateau, l'une de ces rotules étant soli¬ daire de l'une des têtes de guidage et l'autre de ces rotules étant solidaire d'une tige pivotant en un point stationnaire ayant une position symétrique de celle de l'autre tête de guidage par rapport au plan de symétrie de ces deux rotules et en ce qu'il comporte des moyens de liaison mécanique entre ces rotules, ces moyens étant agencés de manière à obtenir des déplacements angulaires symétriques des rotules par rapport audit pian.1. Device for orienting at least one injection and guiding head of a wire electrode in a machine for cutting an electrode-piece by erosive electrical discharges, this machine comprising a support for guides of the wire electrode, a support for the part to be cut, means for producing a relative displacement between these supports so as to obtain the desired shape of the cut, means for moving, on the - support of the head, a plate carrying the guide head, this in directions transverse to the longitudinal axis of the wire, and means for orienting at least one of the guide heads, from these transverse displacements, along the axis of the portion of wire included in the machining zone, character ized in that the tray supports two ball joints arranged on either side of a plane of symmetry and so as to pivot in housings opening respec¬ tively on each face of this tray, one d e these ball joints being attached to one of the guide heads and the other of these ball joints being secured to a rod pivoting at a stationary point having a position symmetrical with that of the other guide head relative to the plane of symmetry of these two ball joints and in that it comprises mechanical connection means between these ball joints, these means being arranged so as to obtain symmetrical angular displacements of the ball joints with respect to said plane.
2. Dispositif selon la revendication 1, comportant des moyens pour déplacer ledit plateau selon l'axe longitudinal du fil, c a r a c t é r i ¬ s é en ce qu'il comporte des moyens pour déplacer ledit point de pivote¬ ment de la tige dans le même sens que le plateau et sur une distance double du déplacement du plateau. 2. Device according to claim 1, comprising means for moving said plate along the longitudinal axis of the wire, characterized in that it comprises means for moving said pivot point of the rod in the same direction as the plate and over a distance twice the displacement of the plate.
EP19810903016 1980-11-06 1981-11-06 Device for orienting a guiding head of an electro-erosion cutting machine Expired EP0064070B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81903016T ATE9070T1 (en) 1980-11-06 1981-11-06 DEVICE FOR ORIENTING A GUIDE HEAD OF AN EDM CUTTING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH8237/80 1980-11-06
CH823780A CH637864A5 (en) 1980-11-06 1980-11-06 Device for guiding a guiding head electrode wire in cutter by electro-erosion.

Publications (2)

Publication Number Publication Date
EP0064070A1 true EP0064070A1 (en) 1982-11-10
EP0064070B1 EP0064070B1 (en) 1984-08-22

Family

ID=4337251

Family Applications (3)

Application Number Title Priority Date Filing Date
EP19810903014 Expired EP0064068B1 (en) 1980-11-06 1981-11-06 Device for orienting the guiding head of an electro-erosion cutting machine
EP19810903016 Expired EP0064070B1 (en) 1980-11-06 1981-11-06 Device for orienting a guiding head of an electro-erosion cutting machine
EP19810903015 Expired EP0064069B1 (en) 1980-11-06 1981-11-06 Device for orienting the guiding head of an electro-erosion cutting machine

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19810903014 Expired EP0064068B1 (en) 1980-11-06 1981-11-06 Device for orienting the guiding head of an electro-erosion cutting machine

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19810903015 Expired EP0064069B1 (en) 1980-11-06 1981-11-06 Device for orienting the guiding head of an electro-erosion cutting machine

Country Status (5)

Country Link
EP (3) EP0064068B1 (en)
JP (3) JPH0698537B2 (en)
CH (3) CH637864A5 (en)
DE (3) DE3165707D1 (en)
WO (3) WO1982001497A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19506775C2 (en) * 1995-02-27 1997-09-25 Agie Ag Ind Elektronik Device for guiding a machining electrode on a spark erosion machine
EP2098322A1 (en) * 2008-03-05 2009-09-09 Agie Sa Flushing device and method for a wire electric discharge machine
WO2010013315A1 (en) * 2008-07-29 2010-02-04 三菱電機株式会社 Thin hole electric discharge machine and electric discharge method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2644369C3 (en) * 1976-10-01 1981-04-16 Aeg-Elotherm Gmbh, 5630 Remscheid Bracket for wire electrodes of spark erosion machines
US4250371A (en) * 1979-01-22 1981-02-10 Barber-Colman Company Accurate production of relieved shapes by electrical erosion

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8201497A1 *

Also Published As

Publication number Publication date
JPS57501670A (en) 1982-09-16
DE3164914D1 (en) 1984-08-23
EP0064068A1 (en) 1982-11-10
EP0064070B1 (en) 1984-08-22
DE3165707D1 (en) 1984-09-27
CH640163A5 (en) 1983-12-30
EP0064069A1 (en) 1982-11-10
CH640162A5 (en) 1983-12-30
WO1982001497A1 (en) 1982-05-13
JPH0698537B2 (en) 1994-12-07
WO1982001496A1 (en) 1982-05-13
JPS57501834A (en) 1982-10-14
EP0064068B1 (en) 1984-07-18
JPS57501669A (en) 1982-09-16
WO1982001495A1 (en) 1982-05-13
CH637864A5 (en) 1983-08-31
DE3164913D1 (en) 1984-08-23
EP0064069B1 (en) 1984-07-18
JPH035929B2 (en) 1991-01-28
JPH0549416B2 (en) 1993-07-26

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